Sewing-machine attachment for spiral stitching



Feb. 5 I924.- 1,482,907

,w. L. BROOKS ET AL SEWING MACHINE ATTA CHMENT FOR SPIRAL STITCHING Filed Oct. 12 1922 2 Sheets-Sheet 1 Feb. 5 1924. 1,482,907

w. L. BROOKS ET AL SEWING MACHINE ATTACHMENT FOR SPIRAL STITCHING Filed Oct. 12 1922 2 Sheets-Sheet 2 Patented Feb. 5, 1924.

UNITED CHUSETTS.

STATES 1,482,907 PATENT OFFICE.

M. SMITH, OF WORCESTER, MASSACHUSETTS, CORSET COMPANY, A CORPORATION OF MASSA- SEWING-MACHINE ATTACHMENT FOB SPIRAL STITCHING.

Application filed October 12, 1922. Serial No. 594,140.

To all whom it may concern:

Be it known that we and WILLIAM M.

SMITH, citizens of VINFrELD L. Bnoons the United States, residing at \Voreester, in the county of Worcester and State of Massachusetts, have inventedor discovered certain new and usei'ul Improvements in Sewing- Machine Attachments of which for Spiral Stitching,

the followmg is a specification,

reference being had therein to the accompanying drawings.

This invention relates to sewing machines for effecting for the purpose of maki dallion or the like, bly comprising means element,

as a cord or wire,

an attachment for spiral stitching ng an ornamental methe attachment preferafor guiding a filling between two superposed layers of fabric and the rows of spiral stitching, appearance to ing the same so the med that i for the purpose of giving a ribbed stiifent will hold its shape.

allion and for To this end the attachment comprises an impaling pin which may be lowered upon the work which has been placed in sewing position, of the feed and at any the needle.

a cord or wire guide two plies of fabric,

This impaling pivot on which the work may forming the first circle of stitches. attachment, in its preferred form,

said pin being arranged at one side distance from pin affords a be turned in The comprises a pivoted desired carried by circular row of stitches has been formed,

is swung into proper cord or wire closely adjacent thus lay such cord or between two circular rows of stitches.

machine is provided on curved grooves adapted the machine and presser foot of the its bottom with two position to direct a to the needle of wire The to receive the circular ribs formed by the filling cord or wire and the circular stitching, and that after one of stitches have been pin may be removed the work will then rection owing to the presser foot at its curved ribbed work, thereby a spiral direction in or two circular rows formed the impaling from the fabric and be fed in a spiral diengagement of the grooves with the feeding the work in forming a medallion,

the stitching commencing near the center of the medallion and ex ward therefrom.

tending spirally out In the accompanying drawings Fig. 1 is a side View showing a portion of a sewing machine with the present invention applied thereto. Fig. 2 is a plan view of a portion of the work-plate of the machine showing the wire or cord guide and the means by which it is pivotally attached to the said work plate, and showing also the presser foot and impaling pin. Fig. 3 is a front end view of the head of the machine with the attachment applied thereto. Fig. 4 is a bottom view of th presser foot and Figs. 5 and 6 illustrate the work performed by the attachment, Fig. 6 being a somewhat diagrammatic section on line 6-6, Fig. 5.

Referring to the drawings, 12 denotes the work-plate and 13 a portion of the bracket arm of a well-known form of sewing machine. Attached to the lower portion of the head 14 of the bracket arm is a small bracket 15 in which is mounted, for vertical movement, a rod 16 to which is adjustably secured, by a set screw 17, the horizontal shank of a pointed impaling pin 18. Between the bracket 15 and a collar secured to the rod 16 is a spiral spring 17 tending to force said rod and the impaling pin carried thereby yieldingly downward. ivoted to the upper part of the rod 16 is a cam lever 19 by which the said rod and the impaling pin carried thereby may be lifted, when the impaling pin is not in use, as partly denoted by dotted ines in Fig. 3.

Attached to the work plate 12, as by screws 20, is a plate 21 havingat its rear end a flange 22. Pivotally attached to the plate 21, by a screw 23, is an arm 24 carryin at its forward end a guide 25 arrange closely adjacent to the needle and adapted to direct a filling and stiffening element, as a wire 26, which is to be laid between the rows a of stitches to form ribs 7) in the work. The arm 24 is of thin flexible sheet metal so that it may be readily inseited between two layers or plies of fabric which are to be stitched together and be tween which the filling, as the wire 26. is to be guided and laid between the rows of spiral stitching. The pivoted arm 24 may be swung outward, as denoted by dotted lines in Fig. 2, when the guide caruse; and when in full lines in Fig. 2

it will be held in place against inward or backward movement by a stop afforded by the flange 22 on the plate 21.

The bottom of the presser-tt'oot 2'? is constructed with two curved grooves 28 to ceive the raised ribs Z) or" the work and as these curved grooves 28 are mostly at one side of the feed dog 0 of the machine the work will be guided towards thelet't Figs. 1 and 2) in a curved direction in trncmina the spiral stitching.

The operation of the invention is as follows: the two plies of layers of fabric d which are to receive the spiral stitching will be placed beneath the presser foot 27 of the machine in the usual manner and the impaling pin 18 will then be lowered upon the same. As the iinpaling pin 38 at one side or the feed dog of the machine the action of the feed dog in :nlvancing the work will cause the latter to be turned in a circle of which the impaling pin is the center, thereby making a circular row of stitches near the center of the medallion to be formed. When the second row of stitches is commenced the cord or wire guide may be swung into place to lay a cord. or wire closely adjacent to the needle and between the first and second row of stitches, aml whenthis second row has progressed a little distance the impaling pin may be lifted and the work will then be guided in a circular direction by the curved grooves 28 in the bottom of the presser foot 2?,and the Stitching will be continued in spiral form until a medallion of proper size has been "formed.

By virtue of the set screw 1'? engaging the horizontal shank portion of the 'impaling pin 18 said pin may be adjusted to different distances from the needle of'the machine. according to the desired size or radius of the first circular row of stitches near the center of the medallion.

it will be noted that the grooves 28 in the bottom of the presser foot 27 are sharply curved throughout their lengths so as to have anextended curved engagement with the ribs 7) of the work, thereby ensuring a proper guiding of the work in a curved dimotion in forming the spiral stitching.

Having thus described our invention we claim and desireto secure by Letters Patent:

1. A sewing machine attachment for spiral stitching comprising an impaling pin on which the work may be turned. a guide adapted to direct a filling element between two plies of fabric and closely adjacent to the needle of the machine, and a presser "foot having in its bottom a plurality of curved grooves.

2. A sewing machine attachment for spiral stitching comprising an impaling pin on which the work may be turned, a guide adapted to direct a filling element between two plies of fabric and closely adjacent to the needle oi the machine, and a presser foot having in its bottom a plurality of curved grooves which are located mostly at one side of the feed dog of the machine.

3. it sew machine attachment for spiral stitching comprising an impaling pin on which the work may be turned. a guide adapted to direct a filling element between two plies oi fabric and closely adjacent to the needle ot the machine. and a presser foot having in its bottom a plurality of curved grooves vhich are located mostly at one side of the feed dog oi? the machine, the said guide being carried by a pirotec arm which may be swun outward away c iron] the needle when the gijiide is not in use.

4. A sewing machine attachment for spiral stitching comprising a. verticall movable and yieldingly mounted impaling pin on which the work may be turned, a guide adapted to direct a filling element between two plies of fabric and closely adjacent to theneedle or the machine, and a presser foot having in its bottom a plurality of curved grooves.

5. ii. sewing machine attachment for spiral stitching comprising a vertically movable and yieldingly mounted impaling pin on which the work maybe turned. a guide adapted to direct a filling elenien't between two plies of fabric and closely adjacent to the needle of the machine, and a presser foot having in its bottom a plurality of curved grooves which are located mostly at one side of the feed dog of the machine.

6. A sewing machine attachment for spiral stitching comprising a vertically movable and yieldingly mounted impaling pin on which the work may be turned, a guide adapted to direct'a filling element'between two plies of fabric and closely adjacent to the needle of the machine, and a presser :t'oot having in itsbottom a plurality of curved grooves which are'located mostly at one side 01"? the feed the said guide being carried by a pivoted arm which may be swung outward away from the needle when the guide is not in use.

7. A sewing machine attachment for spiral stitching comprising a vertically movable and yieldingly mounted impaling pin on which the work may be turned, a guide adapted to direct a filling element betweentwo plies of "fabric and closely adjacent to the needle of the machine.apresser toot having in its bottom a plurality of curved grooves, and means for liftingsaid ilnpaling pin and holding same in raised position.

8. A sew ng machine attachment for spiral stitching comprising a vertically movable and yieldingly mounted impaling the work may be turned, a

pin on which dog of the machine,

guide adapted to direct a filling element between two plies of fabric and closely adjacent to the needle of the machine, a presser-foot having in its bottom a plurality of curved grooves which are located mostly at one side of the feed dog of the machine, and means for lifting said impaling pin and holding same in raised position.

9. A sewing machine attachment for spiral stitching comprising a vertically movable and yieldingly mounted impaling pin on which the work guide adapted to direct a filling element between two plies of fabricand closely adjacent to the needle of the machine, -a presser foot having in its bottom aplurality of curved grooves which are located mostly at one side of the feed dog of the machine,

may be turned, a

the said guide being carried by a pivoted arm which may be swung outward away from the needle when the guide is not in use, and means for lifting said impaling pin and holding same in raised position.

10. A sewing machine attachment for spiral stitching comprising a presser foot having in its bottom two grooves which are sharply curved throughout their lengths, and a wire or cord guide for directin a filling member between two layers of i'a ric to form ribs, received and guided in a circular direction by said grooves.

In testimony whereof we affix our signatures.

WINFIELD L. BROOKS. WILLIAM M. SMITH. 

